no code implementations • 17 Nov 2023 • Naoki Saito, Stefan C. Schonsheck, Eugene Shvarts
Our construction is based on multiscale basis dictionaries on simplicial complexes, i. e., the $\kappa$-GHWT and $\kappa$-HGLET, which we recently developed for simplices of dimension $\kappa \in \mathbb{N}$ in a given simplicial complex by generalizing the node-based Generalized Haar-Walsh Transform (GHWT) and Hierarchical Graph Laplacian Eigen Transform (HGLET).
no code implementations • 16 Jun 2022 • Wai Ho Chak, Naoki Saito, David Weber
We propose to use the Generalized Morse Wavelets (GMWs) instead of commonly-used Morlet (or Gabor) wavelets in the Scattering Transform Network (STN), which we call the GMW-STN, for signal classification problems.
no code implementations • 25 Feb 2022 • Wai Ho Chak, Naoki Saito
The scattering transform network (STN), which has a similar structure as that of a popular convolutional neural network except its use of predefined convolution filters and a small number of layers, can generates a robust representation of an input signal relative to small deformations.
1 code implementation • 11 Jul 2021 • Naoki Saito, Yiqun Shao
This article describes the details of the eGHWT best-basis algorithm and demonstrates its superiority using several examples including genuine graph signals as well as conventional digital images viewed as graph signals.
1 code implementation • 18 Sep 2020 • Alexander Cloninger, Haotian Li, Naoki Saito
We introduce a set of novel multiscale basis transforms for signals on graphs that utilize their "dual" domains by incorporating the "natural" distances between graph Laplacian eigenvectors, rather than simply using the eigenvalue ordering.
no code implementations • 9 Jan 2019 • Chelsea Weaver, Naoki Saito
We consider the decomposition of a signal over an overcomplete set of vectors.
General Classification Sparse Representation-based Classification
no code implementations • 11 Jul 2017 • Naoki Saito, David S. Weber
In this paper, we apply the scattering transform (ST), a nonlinear map based off of a convolutional neural network (CNN), to classification of underwater objects using sonar signals.
no code implementations • 4 Jul 2016 • Chelsea Weaver, Naoki Saito
The dictionary in SRC is replaced by a local dictionary that adapts to the test sample and includes training samples and their corresponding tangent basis vectors.